Bio 171 Anatomy, Week 2
Bio 171 Anatomy, Week 2 BIO 171
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This 2 page Class Notes was uploaded by Sarah Griffey on Sunday September 4, 2016. The Class Notes belongs to BIO 171 at Eastern Kentucky University taught by Lisa Middleton in Fall 2016. Since its upload, it has received 9 views.
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Date Created: 09/04/16
CH. 7 AXIAL SKELETON Bones on the central axis of the body Skull, vertebral column, thoracic cage Skull Skull Cavities Cranial cavity: Cranial bones Ethmoid Sphenoid brain Occipital Temporal (2) Orbital cavity: Parietal (2) eyes Frontal Oral cavity: mouth Facial Bones Nasal cavity: Lacrimal Bones (2) nose Paranasalart of medial wall of the orbits Sinusesma: tear Nasal Bones (2) Most anterior of face Forms bridge of nose (tip is cartilage) Inferior Nasal Conchae (2) Inside nasal cavity Creates turbulence in inhaled air Vomer Thin piece inside nose connecting to the maxilla Forms the nasal septum Mandible Entire lower jaw Supports teeth for chewing Zygomatic (2) Cheekbones Maxilla (2) Holds teeth Keystone of facial bones Palatine (2) Small, Lshape Part of hard palate Mandible Two parts: 1. Body below teeth, makes chin, horizontal portion 2. Ramus vertical, back portion behind teeth, posterior Sutures Sagittal suture: Separates left and right parietal bones. Coronal suture: Separates frontal and parietal bones Lambdoidal: separates the parietal and occipital bones Squamous: separates parietal and temporal bones Vertebral Column Purpose: vertical body support, heads weight support, maintain upright body Curvatures: Cervical: near head, contains Atlas (C1) and Axis (C2) Thoracic: curves inward, second portion of column Lumbar: curves outward, third portion of column Sacral: Smallest and last curvature Vertebrae: Spinous process: Most posterior point of vertebrae Body: Most interior part of back, largest too Vertebral foramen: (foramen opening/hole) hole where spinal cord runs Transverse process: Two points to the right and left of spinous process Lamina: Arch between spinous process and transverse process Pedicle: Arch between transverse process and body o Unique Vertebrae: C1: Atlas controls up and down motion as in “yes” C2: Axis controls side to side movement as in “no” Ribs: Come from thoracic vertebrae True ribs: attached directly through cartilage to sternum False ribs: attached indirectly through cartilage to sternum
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